Automatic gramophone stop or brake.



J. A. C. HIETT. AUTOMATIC GRAMOPHONE STOP OR BRAKE.

APPLICATION FILED JAN.31.1013.

Patented Dec. 29, 1914,

To all whom it may concern;

UNITED STATES PATENT oar-ice. Y

muesli. e. HIETT, or BAKERSFIELD, CALIFORNIA.

' AUTOMATIC GRAMOPHONE STOP OR BRAKE.

Be itknown that-I, JAMES A. c. im,

citizen of the United States, residing at Bakersfield, in the county of KerinStat'e of California, have invented certaimnew and useful Improvements in Automatic'G'ramophone Stops or Brakes;and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to'which it appertains" to make and use the same.

This invention has special reference to brakes or steps for gramophones and the like designed for automatically bringing theturn table of the machine to' a state of rest immediately upon the completion ofthe reproduction .or to permit manual stopping of the machine at any desired time.

.The es'sen'tial'object of the invention is evolved in.- the'provi'siin ofv a simple and novel deviceuof thetharacter aforemenin Fig. 1.

tio n ed including zr'trip. actuated-gbrake or stop adapted to. stop and hOld-th turntable by frictional, contact with the I peripheral edge ofthe'latter, whileengaging means are. p provided for attachment to thereproducer' carrying arm to release said'tripoperating brake-upon the completion of the-repro-. duction, the device being designed for use with machines slightly differing in construction.

With the above and other objectsin view, the invention resides more particularly in the peculiar combinations and arrangements of parts which will be partly illustrated as apreferred embodiment in the accompanying drawings and described in the specifica tion; although the invention is protected for all desirable changes and uses within the scope of the invention as claimed.

Figure l is a top plan view of a fragmentary portion of a gramophone with the invention appliedthereto. Fig. 2 is a side elevation with the parts in the position shown Fig. 3 is a plan view showing the brake in a tripped position so as to bring the turn table to a stop, as well as the working parts of the-gramopho'ne. detail sectional view of the reproducer carrying arm or sounding arm with the trip carried thereby in elevation. Fig. 5 is a de tail View of a modified form of trip. Fig.

-ranged 'edgewise; The freespring carries-a rubberorbthel soft flexi-a-g Fig.4isa.

Specificationcit-Letters Patent. Pat nt d D' 29 1914;

1 Application filed January 31, i913 Serial no. 745,462. 7 i

phone which includes the usualcasing- 10 containing a suitable 'mo toriorl operating the turn table ll which isad'ap'ted to carry the record disk 12 in the usual m'annen.

The reproducer carrying arm'l-"or sounding arm-13 issu'pported in the usual manner at on: side 0t the casing .for pivotalTmovement" to permit its reproduce! 14 to traverse the disk record in traveling from theed'gejtothe center of the latter during the repr o-t chine to a state of rest isbythe'provision of a mechanism connected with the-motorb'ut the present device operates against'the edge of the turn table or metallic rim thereof and embodies a base IGQwhichis securedco;- the top portion of the, casingan d l'iasat tached' thereto nearone end in}; -vertically name the] ble engaging teat or shoe under the action of the spring is normally heldfin j.

moved from the end to'which the spring is anchored and said arm is offset upwardly frictional contact 'or "engagement: with} the vedge 'or ri'mbf the turn 'ta-ble'to 'bringthe latter to a state of rest by; overcoming the and connected pivotally tothe spring near the free end of the latter by a link 21 preferably of wire. In order to hold the shoe 'carried by thevspring disengaged "from the turn table, the arm is swung on itspivot until it is in alinement with the link nd slightly beyond the dead center in a direc tion toward the anchored end of the spring v where it is held by engagement with an an gular stop 22 which is also carried by the base.

As aforementioned, the arm isolfset up-.

wardly, this being for the purpose of-passing over the attaching means of the angular stop and for. elevating the arm whereby an angular engaging member 23 slidably carried on the free end of thearm will be in connumbers of spirally arranged record grooves and for this purpose, the engaging member is p'rovidedwith a longitudinal slot 24 permitting it to be adjusted on a clamping screw and nut 25 carried by the arm, the free end of the arm being bent upwardly as shown at 26 to render the attachment more rigid.

The tripping means for use with a gramophone is in the form of a band 27 which is clamped on the reproducer carrying or sounding arm as by means of a clamping screw 28 when one extremity of the band is longer than the other to provide a trip arm 29 which is adapted to abut the angular end of the engaging member for releasing the spring by moving the trip arm 20 to pass the dead center and consequently permitting the spring to move to a braking position. The trip arm 29 is reinforced by a section of 'Wire 30 held against the-same by a nut 31 mounted on the clampin screw,- it being observed that the band is ormed of a strip of metal,

As a modified form of tripping means, I provide'an angular arm32 the screw shank 83 of which is adapted to be threaded into the reproducer carrying or sounding arm so as to depend from the latter in a similar manner as the trip arm 29, and then held by a set nut 34. 'The arm however may be formed straight as shown'at 35 in Fig. 6, in contradistinction to the angular formation thereof as shown in Fig.5 and as just de scribed. It will thus appear that when the reproducer carrying or sounding arm has moved to thinnermost grooves of the rec 0rd, thev trip .arm will release thebraking spring and bring the turn table and machine Copies of this patent may be obtained for to a stop automatically upon the completion of the reproduction, thus preventing the continuedrotation' of thediskand mutilation of the latter by the reproducing needle,,as now generally occurs. It will also be apparent that the engaging member may be tripped any particular time to operate the brake or stopping mechanism before the completion of the reproduction.

I claim:

A braking mechanism for a machine hav ing a. rotatable element and a swinging arm, said braking mechanism including a resilient arm anchored at one end, a brake shoe carried at the freeend of the resilient arm a and adapted to be normally 'forced into braking position relative to the rotatable element of the machine by the resilient arm,

a. pivoted armadjacent saidresilientarm, a-"

link connection between the resilient arm and the pivoted arm and adapted when said pivoted arm is moved in one direction to draw the resilient arm and the brake shoe away from therotatable element of the ma- I five cents each, by addressing the Commissioner of Patents,

Washington, I). 8. 

